Adducts of 1,1,1-tris(4-hydroxyphenyl)ethane with 1,2-bis(4-pyridyl)ethane and 1,2-bis(4-pyridyl)ethene: continuously interwoven structures in three dimensions

In the adduct 1,2-bis(4-pyridyl)ethane-1,1,1-tris(4-hydroxyphenyl)ethane (1/2), C12H12N2.2C(20)H(18)O(3), the bipyridyl component lies across an inversion centre in P (1) over bar. The trisphenol molecules [systematic name: 4,4',4"-(ethane-1,1,1-triyl)triphenol] are linked by O-H...O hydrogen bonds to form sheets built from R-4(4) (38) rings, and symmetry-related pairs of sheets are linked by the bipyridyl molecules via O-H...N hydrogen bonds to form open bilayers. Each bilayer is interwoven with two adjacent bilayers, forming a continuous three-dimensional structure. In the adduct 1,2-bis(4-pyridyl)ethene-1,1,1-tris(4-hydroxyphenyl)ethane-methanol (1/1/1), C12H10N2.C20H18O3.CH4O, the molecules are linked by O-H...O and O-H...N hydrogen bonds into three interwoven three-dimensional frameworks, generated by single spiral chains along [010] and [001] and a triple-helical spiral along [100].